TSE requested a test system that had not been previously manufactured in Turkey. The device primarily operates by exposing the solar panel to light at a fixed temperature range (60 ± 5°C) and 250w/m² UVC radiation for a specific period. Deviations in temperature changes detected by the UV sensor were calculated and integrated into a PID system, calibrating the chamber. The ±5°C accuracy accepted by the standard was achieved as 0.1°C.